<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Ean13.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_ObjectAbstract
 */
require_once 'Zend/Barcode/Object/ObjectAbstract.php';

/**
 * @see Zend_Validate_Barcode
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Ean13 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Ean13 extends Zend_Barcode_Object_ObjectAbstract {
	
	/**
	 * Coding map
	 * - 0 = narrow bar
	 * - 1 = wide bar
	 * @var array
	 */
	protected $_codingMap = array ('A' => array (0 => "0001101", 1 => "0011001", 2 => "0010011", 3 => "0111101", 4 => "0100011", 5 => "0110001", 6 => "0101111", 7 => "0111011", 8 => "0110111", 9 => "0001011" ), 'B' => array (0 => "0100111", 1 => "0110011", 2 => "0011011", 3 => "0100001", 4 => "0011101", 5 => "0111001", 6 => "0000101", 7 => "0010001", 8 => "0001001", 9 => "0010111" ), 'C' => array (0 => "1110010", 1 => "1100110", 2 => "1101100", 3 => "1000010", 4 => "1011100", 5 => "1001110", 6 => "1010000", 7 => "1000100", 8 => "1001000", 9 => "1110100" ) );
	
	protected $_parities = array (0 => array ('A', 'A', 'A', 'A', 'A', 'A' ), 1 => array ('A', 'A', 'B', 'A', 'B', 'B' ), 2 => array ('A', 'A', 'B', 'B', 'A', 'B' ), 3 => array ('A', 'A', 'B', 'B', 'B', 'A' ), 4 => array ('A', 'B', 'A', 'A', 'B', 'B' ), 5 => array ('A', 'B', 'B', 'A', 'A', 'B' ), 6 => array ('A', 'B', 'B', 'B', 'A', 'A' ), 7 => array ('A', 'B', 'A', 'B', 'A', 'B' ), 8 => array ('A', 'B', 'A', 'B', 'B', 'A' ), 9 => array ('A', 'B', 'B', 'A', 'B', 'A' ) );
	
	/**
	 * Default options for Postnet barcode
	 * @return void
	 */
	protected function _getDefaultOptions() {
		$this->_barcodeLength = 13;
		$this->_mandatoryChecksum = true;
		$this->_mandatoryQuietZones = true;
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (3 * $this->_barThinWidth) * $this->_factor;
		$middleCharacter = (5 * $this->_barThinWidth) * $this->_factor;
		$stopCharacter = (3 * $this->_barThinWidth) * $this->_factor;
		$encodedData = (7 * $this->_barThinWidth) * $this->_factor * 12;
		return $quietZone + $startCharacter + $middleCharacter + $encodedData + $stopCharacter + $quietZone;
	}
	
	/**
	 * Partial check of interleaved EAN/UPC barcode
	 * @return void
	 */
	protected function _checkParams() {
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$barcodeTable = array ();
		$height = ($this->_drawText) ? 1.1 : 1;
		
		// Start character (101)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		
		$textTable = str_split ( $this->getText () );
		$parity = $this->_parities [$textTable [0]];
		
		// First part
		for($i = 1; $i < 7; $i ++) {
			$bars = str_split ( $this->_codingMap [$parity [$i - 1]] [$textTable [$i]] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array ($b, $this->_barThinWidth, 0, 1 );
			}
		}
		
		// Middle character (01010)
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		
		// Second part
		for($i = 7; $i < 13; $i ++) {
			$bars = str_split ( $this->_codingMap ['C'] [$textTable [$i]] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array ($b, $this->_barThinWidth, 0, 1 );
			}
		}
		
		// Stop character (101)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		return $barcodeTable;
	}
	
	/**
	 * Get barcode checksum
	 *
	 * @param  string $text
	 * @return int
	 */
	public function getChecksum($text) {
		$this->_checkText ( $text );
		$factor = 3;
		$checksum = 0;
		
		for($i = strlen ( $text ); $i > 0; $i --) {
			$checksum += intval ( $text {$i - 1} ) * $factor;
			$factor = 4 - $factor;
		}
		
		$checksum = (10 - ($checksum % 10)) % 10;
		
		return $checksum;
	}
	
	/**
	 * Partial function to draw text
	 * @return void
	 */
	protected function _drawText() {
		if (get_class ( $this ) == 'Zend_Barcode_Object_Ean13') {
			$this->_drawEan13Text ();
		} else {
			parent::_drawText ();
		}
	}
	
	protected function _drawEan13Text() {
		if ($this->_drawText) {
			$text = $this->getTextToDisplay ();
			$characterWidth = (7 * $this->_barThinWidth) * $this->_factor;
			$leftPosition = $this->getQuietZone () - $characterWidth;
			for($i = 0; $i < $this->_barcodeLength; $i ++) {
				$this->_addText ( $text {$i}, $this->_fontSize * $this->_factor, $this->_rotate ( $leftPosition, ( int ) $this->_withBorder * 2 + $this->_factor * ($this->_barHeight + $this->_fontSize) + 1 ), $this->_font, $this->_foreColor, 'left', - $this->_orientation );
				switch ($i) {
					case 0 :
						$factor = 3;
						break;
					case 6 :
						$factor = 4;
						break;
					default :
						$factor = 0;
				}
				$leftPosition = $leftPosition + $characterWidth + ($factor * $this->_barThinWidth * $this->_factor);
			}
		}
	}
}
